Secondary

Pronunciation:
|ˈsekən|derē|

Definition:

The term to describe a romantic partner who is someone other than a person’s primary spouse or partner. This is a colloquial term used exclusively within the context of polyamory and primary/secondary relationships.

This term is often paired with the words ‘spouse’ or ‘significant other’ in a sentence.

Example:

Nina didn’t want to demand too much of Aaron, after all, she was his secondary.